Adobe After Effects CS3 Working with layers keyboard shortcuts keys

Shortcut                                                                              Command
Cmnd+Y	New solid layer
Cmnd+Optn+Shft+Y	New null layer
0-9 on numeric keypad*	Select layer (1-999) by its number (enterdigits rapidly for two-digit and three-digit numbers)
Shft+0-9 on numeric keypad*	Toggle selection of layer (1-999) by itsnumber (enter digits rapidly for two-digit and three-digit numbers)
Cmnd+Down Arrow	Select next layer in stacking order
Cmnd+Up Arrow	Select previous layer in stacking order
Cmnd+Shft+Down Arrow	Extend selection to next layer in stackingorder
Cmnd+Shft+Up Arrow	Extend selection to previous layer in stackingorder
Cmnd+Shft+A	Deselect all layers
X	Scroll topmost selected layer to top ofTimeline panel
Shft+F4	Show or hide Parent column
F4	Show or hide Layer Switches and Modes columns
Optn-click solo switch	Turn off all other solo switches
Cmnd+Optn+Shft+V	Turn Video switch on or off for selectedlayers
Cmnd+Shft+V	Turn off Video switch for all video layersother than selected layers
Cmnd+Shft+Y	Open settings dialog box for selected solid,light, camera, null, or adjustment layer
Cmnd+Optn+V	Paste layers at current time
Cmnd+Shft+D	Split selected layers (If no layers areselected, split all layers.)
Cmnd+Shft+C	Precompose selected layers
Cmnd+Shft+T	Open Effect Controls panel for selectedlayers
Optn-double-click a layer	Open source of a layer in Footage panel
Cmnd+Optn+R	Reverse selected layers in time
Cmnd+Optn+T	Enable time remapping for selected layers
[ (left bracket) or ] (right bracket)	Move In point or Out point of selected layersto current time
Optn+[ (left bracket) or Optn+] (right bracket)	Trim In point or Out point of selected layers to current time
Optn-click stopwatch	Add or remove expression for a property
Double-click effect selection in Effects & Presets panel	Add an effect (or multiple selected effects)to selected layers
Cmnd+Shft+, (comma) or Cmnd+Optn+,(comma)	Set In point or Out point by time-stretching
Optn+Home	Move In point of selected layers to beginningof composition
Optn+End	Move Out point of selected layers to endof composition
Cmnd+L	Lock selected layers
Cmnd+Shft+L	Unlock all layers
Cmnd+U, Cmnd+Shft+U, Cmnd+Optn+Shft+U	Set Quality to Best, Draft, or Wireframefor selected layers